For example, you might buffer a school by one mile and use the buffer to select all the students that live more than one mile from the school to plan for their transportation to and from school. Buffers are usually used to delineate protected zones around features or to show areas of influence. These tools output information with buffer features or tables.
Feature-based proximity toolsįor feature data, the tools found in the Proximity toolset can be used to discover proximity relationships. The raster-based cost-distance tools accumulate the cost of each cell traversed between sources and destinations. The raster-based Euclidean distance tools measure distances from the center of source cells to the center of destination cells. The Near tool adds a distance measurement attribute to the input features. For example, the Buffer tool outputs polygon features, which can then be used as input to overlay or spatial selection tools such as Select Layer By Location. The feature-based tools vary in the types of output they produce. Proximity tools can be divided into two categories depending on the type of input the tool accepts: features or rasters.
What is the distance between two locations?.Do any roads pass within 1,000 meters of a stream?.One of the most basic questions asked of a GIS is "what's near what?" For example:
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